Is the means by which sensory receptors convert different forms of energy into neural signals that the nervous system can process.

Lucia is walking barefoot in her yard. she accidentally steps on a nail. how will her nervous system work to generate a reaction? arrange the eventschronologically.

Nephrons, the functional unit of kidneys, are responsible for formation of urine. the sentences describe situations that are the result of problems in the urine formation process. for the nephron shown below, match each situation to the step in the urine formation process where the problem lies.

Natural selection changes allele frequencies because some survive and reproduce more successfully than others.